#include <stdio.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>

char get_first(void);
int main()
{
    int a;
    printf("enter an int\n");
    while (scanf("%d", &a) != 1)
    {
        printf("error");
    }
    printf("done,your number is %d\n", a);

    return 0;
}
